Smoke-preventer.



B. L. AMES.

SMOKE PREVENTEB. APPLICATION-FILED MAR. 20. 1914.

Patented Jan. 4, 1916.

' I flay/17%)? MW M yaw/1 readily connected to theordinary furnace=- fldo'or. V '7 My device is furtherproyidedwith other ieessogf To whom. it d V {of which the following 'isa specifiation5 -'f reference being" had therein to ',the *accom 7 for; the frontwall of a fire-boxlshowi' ng my improved device secured-thereto. Fig. 2 is line2 2 of Fig. 1. Fig. 3' is'a r a section on citizen of the United 3' States, residing at QBoston, countyiofSqufl'olk," State of Massa- ,chiisetts, ha elinventeda certai'nmnew and" useful Improvement in 'SmokePreventers,

panying drawings 1 v Y My invent on relatesto srnoke prefventers of the type employed infconnection with coal fed boilersto preirent the forrnation of smoke and er'zcess ately after firing.

The smoke 'preventer embodying my ino. VVQIltIOII lsof that class which is operated 3 opening the fnrnace'doors. It s p' articularly adapte'dtoloe vattached to any Well known type of boiler'and'is especially constructed and arranged so that it vn'iay. be

new and useful improveinentsrall of which Will be fully understood'froni the following description taken in connection awith the ace coinpanying drawingsxand thefnovel features will bepointed ont and clearly defined in the claims atithe close of the 'specifica a0 tiOI l. 1 ,7 l [In the drawings,Figure1 is an elevation detail of the check valve, 7 v

Having reference to; the lclrawing'sthere is shown at A the low er portion of a boiler of Well. known form and 'c'onstruction sup ported on a fire-box having'a front Wall B provided Withfire doors C." The doors G the Well known: hinged type and. are

are of each'eqiiipped ithlhinge members 11 which coperateliylth hinge members 12"secured to with it.

the front all B of thefi're box; said members being pivetally secured together by means of ayertical rod .13 which is fast the hingefmemberof the doorxand-turns- The rods-18 are provided preferg "ably on their upper. ends Witlrthesprockets le which are connected with other sprockets- 15"by "means of sprocket: chains 16 all as clearly appears 'inIF-ig. 1; The sprockets 15 y are each looselV mounted near the'lowerend :of shafts- 17 mounted .infthe bearings '18 secured to the front Wall-Br.v Fast on each f of the shafts l7 isacollar carryi'ng' a Y i fe' i p' i il Be it known that I; BRADFORD'VLY. AMEs,Q*

gas which arises immediiSTYIOKEQBEVENTERw side of a. corresponding shaft.- The result is thatthe shafts 17am turned in onef'di'rection' by 1 the opening of: notfaffected the closing the" door; but are of the-door. v

pposite sides of theqfront WalLB and are .pinion 21 I which engages rack 22 secured to each endopf the horizontal slide r'ojd '23. Provis on ismade foradju'stment of "the ledconnect ion itheach end of the slide'r'od each pro vided on their upperie'nds Wi'thfa The shafts17 are preferably placed on 0 5- V racks relatively to-the slide rod-by a thread 1 8 0 together with a setfnut 24;),The racks 22,

and the slide rod' 23 are mo vably mounted in' bearings 61; and'one vof the pinions 19' is ab ranged to operate on the rear side of a rack hile the other is arranged to operate on thefrontside sothatthe' opening of-either f one of the-doors C will slide therod to the;

right as shown Fig. 1,}

Theshaft 17 on the rightihand sideof the front all B, as seenin Fig.1, extends u -1 I Wardly above'the pinion 21'" and Vcarrive's'on I its. upper end a; bifurcated-member 136 130v 5 Which it is secured theloall and socket. connection 102; and the pin 103., {The bi fifu'rc'ated member; 36Iisf in turn connected to the stem 37 of: the valvef 38 'by means of a pin-e0 placed at'rightianglesto the pin 103.1 This construction obviat'es anygpossibilityf 'ofvthe yalve' 38 becoming" crampfld' diiejito: v thehon'aliriement of the stern [37" and the} shaft The valve'f38 iis located on a stea m' 'pipe llise 'cured tothefront of the :boiie'r as Sim-ma e providedwith pipefitti'ngs"l2 each of which is connected witha nozzle 43; Whichextends through the front With air d'uctsnot shown to introduce over the top or open.

'lthrongh the nozzles en the Valve" 3-s s; a i? Lira-part as s was thaff o ment of the rod 23 to the right as seen in Fig. 1 caused by opening one of the doors (1,

opens the valve and the movement of the rod in the opposlte direction, closes it as Wlll now be explained. The movement of the rod in the opposite direction, or to the lot as" seen in Fig. l is controlled by an automatic control i7 which is connected with it by means of a member l8 secured to the rack 22 at the left-hand end of the rod. The automatic control 47 consists oi a hollow cylinder 49 which, as shown, is horizontally disposedon the front wall of the boiler and provided with a suitable piston or plunger 50hav1ng therein a check valve to 7 permit the ilow'of liquid through the piston in one direction only. A stuliing box 52 surrounds the piston rod 51. The inner portion oi thepiston rod is surrounded by a helical spring 54: which abuts the end of the cylinder l and the piston 50 and tends to move the piston toward the left as shown in Fig. 1. In the face of the piston is a series of: holes 55 which are automatically closed by the check valves 56. These check valves constem sliding hole in the piston head, as shown in Figs. 1 and 4:. The cylinder 1s provided with a by-pass comprising a pipe 59 connecting the opposite ends of the cylinder and provided with a valve 58 by means of Which the flow through the by-pass may be regulated. The horizontal slide rod 23 which is connected with the plunger 50 as described is normally actuated toward the sit by the spring 5% which surrounds the plunger. In order to aid the spring 54 1 i prefer to employ another spring 60 which is interposed between the center bearing 61, in which the slide rod 23 is mounted, and a collar fast on the slide rod. While I prefer this construction it is obvious that any yielding means for actuating the slide rod in the manner described may equally well be employed. The slide rod is also provided with depending members 68 which may be securedto it in any suitable manner as by collars/3 1- held fast on the rod by set screws 10%. The dependingmembers 63 are each arranged to engage a slot 90 in the end of a horizontalarm (35 operating the air damper 67 pivoted at 66 on the bottom of the re- The movement of the slide rod 23 swings the dampers 67 to open or close the air ducts, as the case may be.

The cylinder 49 of the automatic control 4-7 is preferably filled with oil or other suitable liquid. When either or both of the furnace doors are opened the slide rod 23 is moved to the right as seen in Fig. 1 by the action or the sprockets 1.4, 15 and chains 16,

and the valve 38 isthereby opened allowing a es the depending members 63 swing the air dampers 67 thereby permitting a current of air to be injected into the firebox by the steam and distributed over the fire thus in troducing the required amount oi oxygen to the closing of the second door. It therefore,

results that the additional blast of air is introduced during the time that either door is open and for a pre-determined time after the closing of thedoor which'was closed last. he result of this construction is that the air blastis on just as long as the fireman is working on the fire, and always continues to blow forthe predetermined time after he closes the last door. Vv hen the last door is closed, the springs 5% and 61 begin to move the piston and slide rod back into the star ing position just as tastes the oil flows through the valve 58 and the by-pass to the other end of the cylinder, thus gradually cutting down and finallv completely shutting off the supply of airand steam. This is important for by this construction the fire ob-' tains at all times the exact supply of oxygen iecessary to prevent the format-ion of smoke.

The period for which it is desired to have the additional supply of air injected into the fire-box may be varied by the valve 58 and thus the supply of oxygen may be regulated to meet the requirements in each case. When the plunger 50 is moved to the right by opening one of the doors 0 the check valves are opened by the pressure of the oil and the oil flows freely through the piston to the other end of the cylinder.

It will be noted from the construction hereinabove described that the device embodying my invention is readily adapted to be placed upon a boiler front. The attach ment to the valves is so arranged that if the parts are slightly out of line as is apt to be the case the operation of the valvewill not be aliected. The device may be connected with the furnace doors through the sprocket and chain connection described by merely M said valve and With said door by which the valve is caused to open by opening the door,

said sprocket being loosely mounted to freely rotate without moving said valve member while said door is being closed, and automatic means for closing said valve.

2. In a smoke preventer, the combination of a furnace door, a valve for controlling the supply of steam, a pair of connecting sprockets, one rotatably mounted in connection with the valve member of said valve, the other rotatably mounted in connection with the door, one of said sprockets being arranged to actuate the valve member while being rotated in one direction and to move freely relatively thereto while being rotated in the opposite direction, and automatic means for actuating the valve member in the opposite direction.

3. In a smoke preventer the combination of a furnace door, a valve for controlling the supply of steam, a slide rod operatively connected with the valve, a sprocket connection by which the slide rod is moved in one direction by opening the door, said sprocket being loosely mounted to freely rotate without moving said rod while said door is being closed, and automatic means for moving said rod in the opposite direction.

4. In a smoke preventer the combination of a furnace door, a valve for controlling the supply of steam, a slide rod operatively connected with said valve, a pair of connecting sprockets one rotatably mounted in connection with the rod and the other rotatably mounted in connection with the door, one of said sprockets being arranged to move with the rod in one direction and freely relatively thereto in the opposite direction, and automatic means for moving the slide rod in the opposite direction.

5. In a smoke preventer the combination of a furnace door, a valve controlling the supply of steam, a slide rod operatively connected with said valve, a sprocket connecting the slide rod with the door by which the slide rod is moved in one direction by opening the door, said sprocket being loosely mounted to freely rotate without affecting said rod while said door is being closed, and

automatic means for moving said rod in the opposite direction.

6. In a smoke preventer the combination of a furnace door, a valve for controlling the supply of steam, a slide rod operatively connected with said valve, a sprocket actuating said rod when rotated 1n; one d rection,

said sprocket being loosely mounted to freely rotate in the other direction Without actuating said rod, a second sprocket connected with said first sprocket and mounted on the axis of said furnace door, and automatic means for moving said rod in the opposite direction.

7 In a smoke preventer the combination of a furnace door, a valve controlling the supply of steam, a slide rod operatively connected with said valve, a sprocket connected with said rod, a second sprocket operating said first mentioned sprocket mounted on the hinge pin of said door, one of said sprockets being adapted to rotate with its mounting in one direction and to rotate freely thereon in the other direction, and

automatic means for moving said slide rod to cause the said valve to be closed.

8. In a smoke preventer the combination with a furnace door, a valve controlling the supply of steam, a slide rod operatively connected with said valve, a rack on said slide rod engaged by a pinion, a rod rigidly connected with said pinion having a lug secured thereto, a sprocket loosely mounted on said rod, a pin on said sprocket adapted to engage said lug, a second sprocket connected with said first sprocket mounted upon the axis of said furnace door, said mechanism being adapted to move said rod in one direction when said door is opened, andautomatic means for moving said rod in the other direction.

9. In a smoke preventer the combination of a furnace door, a valve controlling the supply of steam, a slide rod operatively con-v nected with said valve, a rack-and pinion connection for operating said slide rod, a sprocket adapted to engage said pinion while being rotated in one direction and to rotate freely in the other direction without afiecting said pinion, a second sprocket connected with said first sprocket, a hinge pin for said door upon which said second sprocket is mounted whereby the opening of said door causes the said slide rod to be moved in one direction, and automatic means for moving said slide rod in the other direction. l

In testimony whereof I affix my signature, in presence of two Witnesses.

BRADFORD L. AMES.

Witnesses:

GEORGE P. DIKE, Anion I-I. MORRISON.

1 of s pat nt ay be obtained for five cents each, by addressin t commissioner of Patents,

' Washington, 10.0., v 

